// For flags

CVE-2020-36167

 

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An issue was discovered in the server in Veritas Backup Exec through 16.2, 20.6 before hotfix 298543, and 21.1 before hotfix 657517. On start-up, it loads the OpenSSL library from the Installation folder. This library in turn attempts to load the /usr/local/ssl/openssl.cnf configuration file, which may not exist. On Windows systems, this path could translate to <drive>:\usr\local\ssl\openssl.cnf. A low privileged user can create a :\usr\local\ssl\openssl.cnf configuration file to load a malicious OpenSSL engine, resulting in arbitrary code execution as SYSTEM when the service starts. This gives the attacker administrator access on the system, allowing the attacker (by default) to access all data, access all installed applications, etc. If the system is also an Active Directory domain controller, then this can affect the entire domain.

Se detectó un problema en el servidor en Veritas Backup Exec versiones hasta 16.2, versiones 20.6 anteriores a la hotfix 298543 y versiones 21.1 anteriores a la hotfix 657517. Al iniciar, carga la biblioteca OpenSSL desde la carpeta de instalación.&#xa0;Esta biblioteca, a su vez, intenta cargar el archivo de configuración /usr/local/ssl/openssl.cnf, que puede no estar presente.&#xa0;En sistemas Windows, esta ruta podría traducirse a (drive):\usr\local\ssl\openssl.cnf.&#xa0;Un usuario poco privilegiado puede crear un archivo de configuración:\usr\local\ssl\openssl.cnf para cargar un motor OpenSSL malicioso, resultando en una ejecución de código arbitraria como SYSTEM cuando se inicia el servicio.&#xa0;Esto le otorga al atacante acceso de administrador al sistema, permitiendo al atacante (por defecto) acceder a todos los datos, acceder a todas las aplicaciones instaladas, etc. Si el sistema también es un controlador de dominio de Active Directory, entonces esto puede afectar a todo el dominio

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-06 CVE Reserved
  • 2021-01-06 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-434: Unrestricted Upload of File with Dangerous Type
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Veritas
Search vendor "Veritas"
 Backup Exec
Search vendor "Veritas" for product "Backup Exec"
 >= 20.0 < 20.0.1188.2734
Search vendor "Veritas" for product "Backup Exec" and version " >= 20.0 < 20.0.1188.2734"
-
Affected
Veritas
Search vendor "Veritas"
 Backup Exec
Search vendor "Veritas" for product "Backup Exec"
 >= 21.0 < 21.0.1200.1217
Search vendor "Veritas" for product "Backup Exec" and version " >= 21.0 < 21.0.1200.1217"
-
Affected